1. Fixed a wrong conversion of assert(x=f()); to x=f(); assert(x); in ParFlow.C, in the last commit, which would cause seg. fault when running MpiTest.
2. Fixed the same assert() issue in release mode in FileRead.C
3. Added vortex detection metric computation and flow field translation (TranslateField()).  Affected files: Field.*, Solution.*, VectorMatrix.*, OSUFlow.*.  Credit to Wenbin He.
4. Updated Paraview plugins in VTK integration.
5. Improved Testing.  You can now run testing script "tests/VERIFY_OUTPUT" easily when turning on WITH_TESTING using CMake.

git-svn-id: https://svn.mcs.anl.gov/repos/osuflow/trunk@319 6b533941-e25a-0410-8d37-8675ae1e3315